Alcatel Adixen ADS602LM 真空泵

SST-PFB-SLC
6FC5147-0AA14-0AA2
MBF1212-2.5
6SL3100-0BE23-6AB0
MVI56-MNETC
AS-BADU-256
IS200EACFG2A
VMIVME-7698
261A1812P012
3HAC023599-001
2711-T6C1L1

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描述

继电器:一般PLC是可以直接将指令发到控制回路里,但也可能先由继电器中转。打个比方,如果你PLC的输出口带电是24VDC的,但是你的控制回路里画的图需要PLC供的节点却是220VAC的,那么你就必须在PLC输出口加上一个继电器,即指令发出时继电器动作,但后让控制回路的节点接到继电器的常开或常闭点上。也是根据情况选择是否使用继电器。

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